Drain plug

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Dusty B
10+ Years
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Joined: Wed May 23, 2007 7:35 am
Zip Code: 61736
Tractors Owned: '45 SC Case
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Location: IL, Downs

Drain plug

Postby Dusty B » Mon May 25, 2020 7:39 pm

Drain plug twisted? Off flush w/bolster! Drilled hole to drain antifreeze, now what size drill to prepare for retap and what size tap to take it back to original 1/2” pipe plug?? Alternative plan of action.?? :help:
Grandpa's '41 B
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!

tst
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Re: Drain plug

Postby tst » Mon May 25, 2020 8:30 pm

bolster plug is 3/8" pipe

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Dusty B
10+ Years
10+ Years
Posts: 1820
Joined: Wed May 23, 2007 7:35 am
Zip Code: 61736
Tractors Owned: '45 SC Case
Circle of Safety: Y
Location: IL, Downs

Re: Drain plug

Postby Dusty B » Tue May 26, 2020 10:36 am

My bad! Will a 3/8 bit leave it too large to retap? 5/16” bit?
Grandpa's '41 B
'56,,'57,'59, Cu'b
'45 C
'55 Case S
Dad's DB garden tractor
'48 DeSoto
'31 "A Coup
'79 Lincoln TC
God looks out for those of us who don't know how to look out for ourselves!

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ricky racer
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Location: Niles / Buchanan, Michigan

Re: Drain plug

Postby ricky racer » Tue May 26, 2020 10:43 am

Dusty, the tap drill size is 9/16".

http://tkolb.net/chart/NPT_DrillSize.html
1929 Farmall Regular
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub

790rivers
Posts: 41
Joined: Sun Aug 05, 2018 5:44 pm
Zip Code: 12764
eBay ID: Jsimon1
Tractors Owned: 1952 Cub fast hitch, Woods RM59 Fast Hitch, Mott 48" flail fast hitch, 153 Disc plow
Location: Narrowsburg, NY

Re: Drain plug

Postby 790rivers » Tue May 26, 2020 6:16 pm

I had a rust-frozen drain plug on my '47 and learned from the forum about welding on a nut to remove it. The heat from the mig welder released it. Ordered a replacement from TM. Worked like a charm.


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